import tailwindcss from "@tailwindcss/vite";
import react from "@vitejs/plugin-react";
import { defineConfig } from "vite";

// @ts-expect-error process is a nodejs global
const host = process.env.TAURI_DEV_HOST;

// https://vite.dev/config/
export default defineConfig(async () => ({
  plugins: [tailwindcss(), react()],
  // Force esbuild to tree-shake as little as possible from monaco-editor.
  // By default, Vite's pre-bundling applies tree-shaking which discards
  // `monaco.languages.createDiagnosticCollection` and other standalone-editor
  // services that we need at runtime.
  optimizeDeps: {
    esbuildOptions: {
      treeShaking: false,
    },
  },

  // Vite options tailored for Tauri development and only applied in `tauri dev` or `tauri build`
  //
  // 1. prevent Vite from obscuring rust errors
  clearScreen: false,
  // 2. tauri expects a fixed port, fail if that port is not available
  server: {
    port: 1420,
    strictPort: true,
    host: host || false,
    hmr: host
      ? {
          protocol: "ws",
          host,
          port: 1421,
        }
      : undefined,
    watch: {
      // 3. tell Vite to ignore watching `src-tauri`
      ignored: ["**/src-tauri/**"],
    },
    // Dev proxy: the SPA talks to the backend via relative URLs so that the
    // same code works in dev (Vite :1420 → backend :4000) and in self-hosted
    // prod (behind a reverse proxy). The preview webview and its WS are also
    // proxied so the iframe is same-origin with the app.
    proxy: {
      "/api": "http://localhost:4000",
      "/preview-app": {
        target: "http://localhost:4000",
        // the webview is HTML; rewrite so the path is preserved for upstream
        ws: false,
      },
      "/lsp": { target: "ws://localhost:4000", ws: true },
      "/preview": { target: "ws://localhost:4000", ws: true },
    },
  },
}));